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Pattern-formation during the CO oxidation on Pt(110) surfaces under global coupling

Item Type:Article
Title:Pattern-formation during the CO oxidation on Pt(110) surfaces under global coupling
Creators Name:Falcke, M. and Engel, H.
Abstract:A reaction-diffusion model for CO oxidation on Pt(110) single crystals proposed by Krischer, Eiswirth, and Ertl is supplemented by an equation for the balance of CO partial pressure in the gas phase. This allows us to study the interaction of local and global coupling with the dynamics of the reaction in the oscillatory regime. In absence of global coupling a stability analysis of the homogeneous oscillatory state predicts parameter regions with negative values of the phase diffusion coefficient indicating the possibility of phase turbulence. In the globally coupled system without diffusion we observe the formation of phase-locked clusters of oscillators and irregular behavior. If both surface diffusion and global coupling through the gas phase are taken into account depending on the range of external parameters we get the following types of structures: phase flips, standing waves, spatially irregular coverage pattern, and the uniformly oscillating surface.
Keywords:Single Crystal Surfaces, Standing Waves, Turbulence, Transition
Source:Journal of Chemical Physics
Publisher:American Institute of Physics (U.S.A.)
Page Range:6255-6263
Date:October 1994
Official Publication:https://doi.org/10.1063/1.468379

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